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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Joas Schilling <coding@schilljs.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <robin@icewind.nl>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Thomas Müller <thomas.mueller@tmit.eu>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
/**
* Public interface of ownCloud for apps to use.
* Preview interface
*
*/
// use OCP namespace for all classes that are considered public.
// This means that they should be used by apps instead of the internal ownCloud classes
namespace OCP;
use OCP\Files\File;
use OCP\Files\NotFoundException;
use OCP\Files\SimpleFS\ISimpleFile;
/**
* This class provides functions to render and show thumbnails and previews of files
* @since 6.0.0
*/
interface IPreview {
/**
* @since 9.2.0
*/
public const EVENT = self::class . ':' . 'PreviewRequested';
public const MODE_FILL = 'fill';
public const MODE_COVER = 'cover';
/**
* In order to improve lazy loading a closure can be registered which will be
* called in case preview providers are actually requested
*
* $callable has to return an instance of \OCP\Preview\IProvider
*
* @param string $mimeTypeRegex Regex with the mime types that are supported by this provider
* @param \Closure $callable
* @return void
* @since 8.1.0
*/
public function registerProvider($mimeTypeRegex, \Closure $callable);
/**
* Get all providers
* @return array
* @since 8.1.0
*/
public function getProviders();
/**
* Does the manager have any providers
* @return bool
* @since 8.1.0
*/
public function hasProviders();
/**
* Returns a preview of a file
*
* The cache is searched first and if nothing usable was found then a preview is
* generated by one of the providers
*
* @param File $file
* @param int $width
* @param int $height
* @param bool $crop
* @param string $mode
* @param string $mimeType To force a given mimetype for the file (files_versions needs this)
* @return ISimpleFile
* @throws NotFoundException
* @throws \InvalidArgumentException if the preview would be invalid (in case the original image is invalid)
* @since 11.0.0 - \InvalidArgumentException was added in 12.0.0
*/
public function getPreview(File $file, $width = -1, $height = -1, $crop = false, $mode = IPreview::MODE_FILL, $mimeType = null);
/**
* Returns true if the passed mime type is supported
* @param string $mimeType
* @return boolean
* @since 6.0.0
*/
public function isMimeSupported($mimeType = '*');
/**
* Check if a preview can be generated for a file
*
* @param \OCP\Files\FileInfo $file
* @return bool
* @since 8.0.0
*/
public function isAvailable(\OCP\Files\FileInfo $file);
/**
* Generates previews of a file
*
* @param File $file
* @param array $specifications
* @param string $mimeType
* @return ISimpleFile the last preview that was generated
* @throws NotFoundException
* @throws \InvalidArgumentException if the preview would be invalid (in case the original image is invalid)
* @since 19.0.0
*/
public function generatePreviews(File $file, array $specifications, $mimeType = null);
}
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